SDN课程阅读作业(2)

1.过去20年中可编程网络的发展可以分为几个阶段?每个阶段的贡献是什么?

SDN课程阅读作业(2)_第1张图片

(1) active networks

  • introduced programmable functions in the network to enable greater to innovation;

  • Programmable functions in the network to lower the barrier to innovation;

  • Network virtualization, and the ability to demultiplex to software programs based on packet headers;;

  • The vision of a unified architecture for middlebox orchestration.

(2) control and data plane separation

  • developed open interfaces between the control and data planes;

  • Logically centralized control using an open interface to the data plane;

  • Distributed state management;

(3) the OpenFlow API and network operating systems

  • represented the first instance of widespread adoption of an open interface and developed ways to make control-data plane separation scalable and practical.

  • Generalizing network devices and functions

  • The vision of a network operating system

  • Distributed state management techniques

2.网络虚拟化与SDN的关系?

 • represented the first instance of widespread adoption of an open interface and developed ways to make control-data plane separation scalable and practical.

  • Generalizing network devices and functions

  • The vision of a network operating system

  • Distributed state management techniques

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